紧压白茶品质安全性评价

Safety Quality of Compressed White Tea

为了探明紧压白茶饮用的安全性,以不同年份和花色的紧压白茶为原料,选用国家标准方法测定其主要的品质安全性指标,并进行分析和评价。结果表明:不同年份和花色的紧压白茶中未测出致病菌,其中1个样品检出霉菌;农药残留符合GB2763-2016食品中污染物限量要求;重金属检测中,铅含量0.229~0.819 mg/kg,砷含量0.071~0.205 mgkg,镉含量0.006~0.036 mg/kg,铬含量0.111~6.522 mg/kg,铜含量9.892~23.399 mg/kg,铝含量126.717~668.417 mg/kg,汞含量0~0.024 mg/kg,符合食品中污染物限量要求;理化检测中,水分含量4.6%~10.5%,灰分含量4.6%~5.7%,水浸出物含量30.2%~40.1%,茶梗含量0.8%~4.5%。由此可得出结论:紧压白茶的品质安全性可靠。

In order to prove quality and safety of compressed white tea,the main quality safety indexes of compressed white tea with different years and colors were determined by national standard method and evaluated. Results showed that no pathogenic bacteria was found in compressed white tea with different years and colors,and mould was found in 1 sample. Pesticide residues meet GB2763-2016 food pollutant limit requirements. Heavy metal detection results were that Pb content was 0. 229-0. 819 mg/kg,As content was 0. 071-0. 205 mg/kg,Cd content was 0. 006-0. 036 mg/kg,Cr content was 0. 111-6. 522 mg/kg,Cu content was 9. 892-23. 399 mg/kg,Al content was 126. 717-668. 417 mg/kg,Hg content was 0-0. 024 mg/kg. The results of heavy metal detection met requirements of pollutant limits in food. Results showed that water content was 4. 6%-10. 5%,ash content was 4. 6%-5. 7%,the water extract content was 30. 2%-40. 1%,and the tea stalk content was 0. 8%-4. 5% by physical and chemical testing. Quality of compressed white tea was safe and reliable.